Making a hammer from a book - video

[Jon]

I'm waiting for this making-a-x-from-a-y trend to evolve into more complex projects with additional steps, by which multiple tools are made by rebuilding the same original item, through a carefully ordered series of construction steps. Like: tool X is turned into tool Y, and then tool Y is turned into tool Z.

I can't find a functional reason for someone to do this, beyond the complex challenge and the appeal of a Rube Golderg-esque style of toolmaking.